Laser and optical micrometers perform fast, accurate dimensional analysis on manufactured parts, commonly in quality control lab or plant floor settings. Laser micrometers operate by using a rotating optical component to refract or reflect a laser beam through the micrometer's measurement area and onto an object. The receivers on the other side detect the time at which the laser crosses part edges, and this data is converted to measurement specifications. Optical micrometers generate an LED light instead of a laser. An optical micrometer measures parts by calculating the displacement difference between the measured values of light and dark edges.